Preparation and Thermal Characterization of Core-Shell Structure Fe/Al Composites Powders

Journal of Propulsion Technology ›› 2013, Vol. 34 ›› Issue (5): 693-698.

• Material,Propellant and Fuel • Previous Articles Next Articles

Preparation and Thermal Characterization of Core-Shell Structure Fe/Al Composites Powders

Hunan University of Technology, Zhuzhou 421000, China;State Key Laboratory of Materials Processing and Die and Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China;Hunan University of Technology, Zhuzhou 421000, China;State Key Laboratory of Materials Processing and Die and Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China

Published:2021-08-15

核壳结构Fe/Al复合粉体的制备及其放热性能分析

陈志安^1,2,胡木林²,唐少炎¹,王振业²

湖南工业大学,湖南株洲 412007;华中科技大学材料学院模具技术国家重点实验室,湖北武汉 430074;湖南工业大学,湖南株洲 412007;华中科技大学材料学院模具技术国家重点实验室,湖北武汉 430074

作者简介:陈志安(1987—),男,硕士生,研究领域为核壳结构复合粉体的制备及应用。E-mail:cza440@126.com
基金资助:
国家“八六三”项目(2009AA03Z317)。

Abstract

Abstract: In order to solve the micro aluminum combustion problems of reaction kinetics, long ignition delays and incomplete combustion,Core-shell Fe/Al composites were successfully prepared by fluidized bed chemical vapor deposition(FB-CVD)with two kinds of micro aluminum and iron carbonyl as precursor. The characterization of the as-prepared composites was carried out using SEM, XRD and simultaneous TG-DSC. It is found that the aluminum core is coated compactly and uniformly by an iron layer ,the iron contents of the samples prepared by Q1are 3.62%,7.82%,12.83%,respectively. Exothermic reaction of the obtained composite powders shows significant improvement compared to pure aluminum powders. Although the exothermic peak temperature of the composite powders is higher than that of pure micrometer-sized aluminum powders, heat release is obviously improved.The mass gain increases from 20.74% of pure Q1to over 75.74% of Q1coated up to 1500℃.Composite powder contained 7.82% of iron has the maximum mass gain of 80.71% and an optimal thermal performance is obtained.

Key words: Fe/Al composites; Chemical vapor deposition; Core-shell structure; Exothermic reaction

摘要： 为了解决微米铝粉燃烧动力学慢、点火延迟长、燃烧不充分等问题,以羰基铁为前驱体,用流化床化学气相沉积(FB-CVD)法对两种不同粒径的微米铝粉进行了包覆,利用SEM,XRD和TG-DSC对所制得的Fe/Al复合粉体进行了表征。结果表明铁层均匀致密地包覆在铝颗粒表面,由Q1铝粉所制备的样品中铁的含量分别为3.62%,7.82%,12.83%。铁的包覆对铝的放热性能有很大影响,复合粉体的高温放热峰温度相对于原始铝粉虽有所升高,但是其放热过程更迅速、更集中,氧化得更充分,1500℃时其增重由原始铝粉的20.74%提高到75.74%以上,铁的包覆量为7.82%的复合粉体增重可达到80.71%,其放热性能最优。 

关键词: 铁铝复合粉体;化学气相沉积;核壳结构;放热反应 

CHEN Zhi-an^1,2, HU Mu-lin², TANG Shao-yan¹, WANG Zhen-ye². Preparation and Thermal Characterization of Core-Shell Structure Fe/Al Composites Powders[J]. Journal of Propulsion Technology, 2013, 34(5): 693-698.

陈志安,胡木林,唐少炎,王振业. 核壳结构Fe/Al复合粉体的制备及其放热性能分析[J]. 推进技术, 2013, 34(5): 693-698.

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Preparation and Thermal Characterization of Core-Shell Structure Fe/Al Composites Powders

核壳结构Fe/Al复合粉体的制备及其放热性能分析

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